Derived from the LabRx database from Oct. 1st 2004 to Sep. 30th 2009. The LabRx Database (referred to in publications as the "i3 InVision Data Mart") is provided by Ingenix Pharmaceutical Services, Inc. It is a comprehensive, de-identified U.S. healthcare claims database that contains the aggregated health claims experience of the covered lives managed by United Healthcare. It contains only those covered lives for which there exists a combined benefit structure including medical and prescription coverage. Overall, it is representative of the non-elderly, insurance-carrying population in the U.S., but it also contains information on several hundred thousand Managed Medicaid and Medicare Advantage members. It contains inpatient, outpatient and pharmacy claims, lab results and enrolment information on over 30.5 million lives from October 2004 through September 2009.